CO2-Based Enhanced Oil Recovery for the Alaska North Slope
(Formal Title: Plains CO2 Reduction Partnership Initiative to Accelerate Carbon Capture, Utilization, and Storage Deployment)
Utilizing CO2-based EOR methods is known to significantly increase the recovery factor for light oils, as well as for heavy and viscous oils. Reservoir simulations are being conducted to estimate the amount of incremental ANS crude oil production might occur for different CO2 concentrations. The modeling will also estimate the quantity of CO2 that is permanently sequestered in the oil reservoir.
In Alaska, natural gas is co-produced with crude oil. The natural-gas liquids are condensed, then blended with crude oil for delivery to market through the 800-mile Trans-Alaska Pipeline System. Because there is currently no commercial market for Alaska’s natural gas, it is re-injected into the oil reservoirs to maintain reservoir pressure. If it becomes economical to export ANS natural gas to market, then CO2 and other impurities will be separated from the natural gas in order to attain “pipeline quality”. While CO2 in the presence of water becomes corrosive and poses increased risks to the integrity of downhole and surface production facilities, problem can be mitigated by the use of corrosion inhibitors and by installing corrosive resistant equipment. However, corrosion inhibitors that work effectively in ANS have not been demonstrated when the injectent exceeds a CO2 concentration level of about 20%. This research will evaluate corrosion inhibitor performance for various CO2 concentrations so as to determine the “upper limit” for CO2 concentrations, or potentially develop new corrosion inhibitor chemicals.
|Budget||Funding Agency||Project Partners||Period of Performance|
($1.5 million from DOE/NETL; $0.38 million primarily from UAF salary match)
|Dept. of Energy/National Energy Technology Lab
This is a subaward from the Univ. of North Dakota’s Energy and Environmental Research Center
Univ. of Alaska Fairbanks
Univ. of Wyoming
Hilcorp (carrying on in BP’s place)
|2020 – 2024|